There are always risks to surgery.
Read up on doubling time, before making a decision about any advanced
cancer/mets surgeries.
J

http://www.cancerbacup.org.uk/Cancertype/Liversecondary/Treatment/Surgery
Surgery as a treatment for secondary liver cancer

Secondary cancer in the liver is most often treated with chemotherapy and
not with an operation, as more than one area of the liver is usually
affected.

Liver transplants (removal and replacement of the liver) are not used for
people who have secondary liver cancer. This is because when it has been
tried in the past, the cancer usually came back soon afterwards due to the
drugs that are used to prevent the body rejecting the transplanted liver.

Sometimes, it is possible to remove the affected part of the liver with
surgery. This sort of surgery is called a liver resection and is most
commonly used to remove secondary liver tumours that have come from a
primary cancer in the bowel. If the cancer cells are in a single area of
the liver the surgery may sometimes cure the cancer.

You can discuss with your doctor whether surgery may be helpful in your
particular situation.

Recent improvements in liver surgery mean that several tumours can
sometimes be removed from more than one area of the liver in a single
operation. Chemotherapy is sometimes used to shrink tumours before surgery
to make the operation safer and more successful.

Liver resection is a major operation that takes from 3­­-7 hours, and is
carried out in specialist liver surgery hospitals. It is only suitable for
a small number of people with liver cancer. There are usually no long-term
side effects following liver resection, as the remaining liver can regrow
within a few months of the operation and carry out all its normal
functions.

Before any operation, make sure you have discussed it fully with your
doctor so that you understand what it involves.